Those pups look well fed, they probably have a better life than most house dogs.
I don't remember ever encountering hostile street dogs.
I know they exist somewhere, and I have encountered aggressive dogs in the rural countryside in the US, usually that is because of the owner though.
They definitely seem pretty happy and well looked after. I’ve seen some rough dogs in Central America and usually they’re not of concern as long as they aren’t in packs and you don’t encroach on them.